Patent GB-723134-A (GB)
Title: Improvements in or relating to shoe upper shaping machines
IPC: A43D11/00
Filed: 1953-02-26
Abstract: 723,134. Shoe-upper shaping machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Feb. 26, 1953 [Feb. 27, 1952], No. 5099/52. Class 17 (1). The machine is designed to shape the upper to the last by pairs of toe wipers, heel end wipers and side wipers and then to press the margin of a sole against an outflanged margin of the upper to attach the upper to the sole by previously applied adhesive all round the shoe, in preparation for stitching. A pair of thin auxiliary wipers attached to the top wipers overlap the side wipers to avoid gaps. Cams on shaft 24, Fig. 1, which is controlled by a one-revolution clutch operated by treadle 44, operates lever 26 to advance toe wipers 130, levers 28 actuate tip-line grippers on left and right, thrust member 30 actuates toggles 32, 34 to move post 36, bearing the sole press, upwards, and links 38 with spring 40 operates mechanism to advance carriage 42 to actuate heel and side wipers. The grippers comprise a lower jaw 46 on shaft 52 and an upper jaw 58, the jaws being initially closed by depression of treadle 72, through 78, 80, 76, 82, which raises 62, 52, and jaws 46, jaw 58 being held by a fixed plate 84 on the toe head 86. Slide 80 carries a spring-pressed detent 102, Fig. 2, having a tooth which normally engages ratchet teeth on a fixed plate 106, and a tail 108 with a pin 114 in the path of arm 110 of a bell crank. An adjustable screw 118 on arm 120, Fig. 2, of the bell crank lies in the path of a spring-pressed plunger 121 on toggle 32. Upward movement of toggle 32, at a time just before cam 122 on shaft 64 engages a roll to move plate 62 down to open the jaws, disengages the detent through 118, 120, 110, 114. Jaws 46 and 58 move downwardly and toewardly in an arcuate path to tension the upper and then open and move away from the work. The arcuate movement is accomplished by lever 28 through line 124 and turnbuckle 126, by which the jaws are adjusted widthwise of the shoe. The toe wipers 130, Fig. 4, have thin flexible auxiliary wiper plates secured thereto to overlap the side wipers 134. Wipers 130 are secured to carrier plates 140 which are guided by fixed rolls 142, 144 engaged in arcuate slots 146, 148 therein, and moved by lever 26 through the adjustable screw 149, 151, 153, 155. The butting point heel wipers 132, Figs. 4, 8, are rotatable in carriers 156 on studs 154, and normally held open by springs 162. Carrier 156 is slidable lengthwise of the shoe in a slide 170, being limited by pin and slot, and is normally held at the limit of its toeward movement relatively to the slide by a spring 180. Slide 170 has downwardly extending studs on which carrying plates 190 for the side wipers 134 are pivotally mounted, plates 190 being moved by rack teeth 192, 198 on the carrier 156 with gear segments 196, 200 on plates 190. To align the creases formed by wipers 134 and 130, the plates 190 are held in accurately predetermined position between flanged extensions 171 and arms 175 on slide 170. Slide 170 is moved by handles 206 from its retracted position, while the shoe is supported slightly below its lasting position, to bring the heel and side wipers into engagement with the upper on last on a line above the last bottom. A spring-urged detent 208 engaging teeth on a plate 210 on the carriage 42 prevents return of the slide, but is retractable by means of a bell crank 216 having a handle 221, Figs. 4, 8, which may be operated by the thumbs while the hands grip handles 206. The extent of the powered toeward movement of heel wipers 132 is determined by engagement of an adjustable abutment member 224 with the heel end of the upper. When the slide is manually operated carrier 156 and slide 170 move together until wipers 132 engage and close around the heel end of the upper, whereupon slide 170 moves relatively to the carrier 156, actuating segments 196, 200 to swing wipers 134. Power operation then moves slide 170 further. The crown of the last is engaged by a spring-urged holddown plunger 232, Fig. 1, which is adjustable on an arm 238 rotatable on a post 240 on slide 170 and held by spring washer and nut. A spring-pressed plunger in the carriage projects into the path of arm 175 and prevents removal of slide 170 from the carriage. Power operation of the wipers 132, 134 is accomplished by movement of member 30 which operates through spring 40 on a rod 38 slidable in a bearing in yoke 278, Fig. 1, connected to a lever 280, the cutter slidably engaging a block 288, Fig. 8, pivoted at 290 to the carriage 42 which slides on rails 270. A pin 282 in yoke 278 moves in a slot 284 in lever 280, this lost motion being adjusted by a screw 286 entering the slot. The normal retracted position of the carriage is determined by engagement of the spring-pressed plunger 294 on lever 280 with plate 274, and of a collar on rod 38 with yoke 278. The wipers 134 are adjusted lengthwise of the shoe by means of attachment screws 300 movable along slots 298 in carrying plates 190, are notched for ready attachment to these plates, and are oriented by engagement of bevelled edge faces with. complementary shoulders. The sole pressing member 306 supported on a carrier 308 on post 36 is recessed to receive a detachable heel supporting plate having plane surfaces 316, 318 joined by a bevelled surface 320. The toe supporting surface of member 306 is downwardly inclined heelwardly to compensate for the toe spring of the shoe in the machine. In operation, the shoe is located in the machine, the flanged margins of the upper directed into the grippers, the jaws closed by treadle 72, slide 170 moved forward by handle 206, plunger 232 swung over the last, and the power cycle initiated by depression of treadle 44. Thereupon the grippers operate to tension the upper, the wipers close inwards simultaneously with the upward movement of member 306, and the wipers finally closed to form the crease line. The machine then comes to rest with the work under pressure between member 306 and the wipers, and work is positioned at a second station. While the work at the second station is under pressure the operator retracts detent 206 by handle 221 and retracts the slide. Specification 341,958 is referred to.